I suppose I don't really buy the premise put forth from either direction; I don't buy that it's possible to be present while doing something else (for me anyway) AND I don't buy that this is gonna be immersive. I'm not stating these things as claims; this is just my reaction to the app store copy.
I did buy it and love it though. What really works for me is as a way to hang out with my kid when she's doing her own thing. I want to be available to be present at a moment's notice.